As a result of the improved stability of laminated timber construction we are able to provide guarantees for ten years on our paint finish and six years on our stain finish.

NOTE: All guarantees are subject to limitations and are strictly dependent upon compliance with manufacturers' usage and maintenance instructions. These are available upon request.

  • Stain Finish

  • Paint Finish

  • Rot & Fungal Attack

  • Sealed Units

  • Ironmongery

Features & Benefits

  • Available in both Double and Triple Glazed.
  • Improved thermal performance.
  • Window energy ratings A to C.
  • Efficient 24mm double glazed unit with Ultra Low STORVIKSKD U-Values to 1.2 Wm2K.
  • Quality laminated Redwood Nordic Pine construction.
  • Manufactured from the finest FSC accredited timber on request.
  • Slim profile, flush fit styling enables window furniture to be concealed.
  • BRE Green Guide A+ Rated.
  • European Conformity.
  • Supplied fully finished in our extended range of paints and stains.
  • Extensive guarantees for long lasting peace of mind.
  • Incorporating Swisspacer ULTIMATE, the leading warm edge spacer fitted where appropriate.


Choose from a range of paint and stain finishes with built-in high performance, endurance and quality, see customisation options for further information.

Note: Frames are generally available in most standard RAL colours but no darker than Slate Grey RAL 7015. For information on RAL colours please contact the Sales Office on 0330 119 2369.

Note: All Howarth paint/stain finishes are silk and not high gloss.

Customisation Options

Standard Paint Finishes

  • Copper Brown
    RAL 8004

  • Pure White
    RAL 9010

  • Gardenia
    RAL 1013

  • Country Cream
    RAL 9001

  • Buttermilk
    RAL 1015

  • Pale Green
    RAL 6021

  • Pebble Grey
    RAL 7032

  • Dusty Grey
    RAL 7037

  • Slate Grey
    RAL 7015

  • Pastel Blue
    RAL 5024

Standard Stain Finishes

  • Oak

  • Teak

  • Honduras

  • Walnut

  • Rosewood


  1. Mortar key groove
  2. Night vent recessed to fit flush with inside face of head vent positioned deeper to allow for dry lining
  3. Head drip projects below vent slot to give good weather protection
  4. Eurogroove to accept S.B.D shootbolt locking mechanism
  5. Dual weatherseal
  6. Pinless glazing bead
  7. Eurogroove to accept S.B.D shootbolt locking mechanism
  8. Optimum weatherseal / sash / frame relationship for weather performance, also allows for natural timber movement
  9. 24mm Sealed glazing unit
  10. 28mm plant-on bars with an option for a 19mm bar
  11. Optimum weatherseal / sash / frame relationship for weather performance
  12. 18mm rebate upstands for improved glazing performance and durability
  13. Drained and vented bead
  14. 6 degree slope on sill and sash rail to assist drainage. Also accommodates drained and vented glazing systems
  15. 6 degree slope on sill and sash rail to assist drainage. Also accommodates drained and vented glazing systems
  16. Sill options shown are
    A= Flush sill (108mm)
    B= Stub sill (144mm)
    C= Standard sill (194mm)
    D= Extended sill (244mm)

Cross Section Through Horizontal

  1. Flush fitting sash/ frame configuration is ideal for conservation areas
  2. Typical standard mullion
  3. Eurogroove to accept S.B.D. shootbolt locking system
  4. Flush fitting stile to accept 24mm glazing unit
  5. New slim profile jamb detail


Our Product Specification, Technical Specification and current brochure are available in PDF format for you to download and make an informed decision. If there's something you can't find, please don't hesitate to contact us.


Please use the link below to contact Howarth Timber Windows & Doors and we will get back to you within 48 hours.